<template>
  <view v-if="goods_info.goods_name" class="goods-detail-container">
    <!-- 轮播图区域 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item,index) in goods_info.pics" :key="index">
        <image :src="item.pics_big" @click="preview(index)" @error="imgerror($event, index)"></image>
      </swiper-item>
    </swiper>
    <!-- 商品信息区域 -->
    <view class="goods-info">
      <!-- 商品价格 -->
      <view class="goods-price">
        ￥{{goods_info.goods_price}}
      </view>
      <!-- 商品主体信息 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">
          {{goods_info.goods_name}}
        </view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!--运费 -->
      <view class="yf">
        快递：免运费
      </view>
    </view>
    <!-- 商品详情信息 -->
    <rich-text :nodes="goods_info.goods_introduce" class="rich-text"></rich-text>
    
    <!-- 商品导航 -->
    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
      <view class="empty-view">
        
      </view>
    </view>
  </view>
</template>

<script>
  import {mapState,mapMutations,mapGetters} from 'vuex'
  export default {
    computed:{
      ...mapState('m_cart',['cart']),
      ...mapGetters('m_cart',['total'])
    },
    watch:{
      // total(newVal){
      //  const findResult =  this.options.find(x => x.text === '购物车')
      //  if(findResult){
      //    uni.$showMsg('加入购物车成功',1500,'success')
      //    findResult.info = newVal
      //  }
      // }
      
      cart:{
        handler(newVal){
         const findResult =  this.options.find(x => x.text === '购物车')
         if(findResult){
           findResult.info = newVal.length
         }
        },
        immediate:true
      }
    },
    data() {
      return {
        // 定义详情数据
        goods_info: [],
        // 商品导航数据
        options: [{
        			icon: 'shop',
        			text: '店铺',
        		}, {
        			icon: 'cart',
        			text: '购物车',
        			info: 0
        		}],
        buttonGroup: [{
        	      text: '加入购物车',
        	      backgroundColor: '#ffa200',
        	      color: '#fff'
        	    },
        	    {
        	      text: '立即购买',
        	      backgroundColor: '#ff5c00',
        	      color: '#fff'
        	    }
        	    ]
      }
    },
    onLoad(options) {
      const goods_id = options.goods_id
      // 调用getGoodsDetail方法
      this.getGoodsDetail(goods_id)
    },
    methods: {
      //把 m_cart 模块中的 addToCart 方法映射到当前页面使用
      ...mapMutations('m_cart',['addToCart']),
      // 定义getGoodsDetail方法
      async getGoodsDetail(goods_id) {
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/goods/detail', {
          goods_id
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        // 解决详情信息图片间隙问题
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;"').replace(/webp/g,'jpg')
        this.goods_info = res.message
      },
      // 轮播图预览放大
      preview(i) {
        uni.previewImage({
          current: i,
          urls: this.goods_info.pics.map(x => x.pics_big)
        })
      },
      imgerror(e, img_index) {
        var _this = this
        if (_this.goods_info.pics.length > 0) {
          _this.goods_info.pics[0].pics_big = "../../static/error.png"
          _this.goods_info.pics[img_index].pics_big = "../../static/error.png"
        }
      },
      //底部导航左侧按钮
      onClick(e){
        if(e.content.text === "购物车"){
          uni.switchTab({
            url:'/pages/cart/cart'
          })
        }
      },
      // 底部导航右侧按钮
      buttonClick(e){
        if(e.content.text === "加入购物车"){
          // 组织商品信息对象
          const goods = {
            goods_id:this.goods_info.goods_id,
            goods_name:this.goods_info.goods_name,
            goods_price:this.goods_info.goods_price,
            goods_count:1,
            goods_small_logo:this.goods_info.goods_small_logo,
            goods_status:true
          }
          // 调用addToCart方法
          this.addToCart(goods)
          uni.$showMsg('加入购物车成功',1500,'success')
        }
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;

    image {
      width: 100%;
      height: 100%;
    }
  }

  .goods-info {
    padding: 10px;
    padding-right: 0;

    .goods-price {
      font-size: 18px;
      color: #c00000;
      margin: 10px 0;
    }

    .goods-info-body {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
        margin-right: 10px;
      }

      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }

    .yf {
      font-size: 12px;
      color: gray;
      margin: 10px 0;
    }
  }
  .goods-nav{
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 9999;
    font-weight: 500;
  }
  .empty-view{
    height: 50px;
    background-color: #ffffff;
  }
  .goods-detail-container{
    padding-bottom: 50px;
  }
</style>
